Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1993SUBURBAN C2500, 7.4 NREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONTROL UNITS
1993 Chevrolet Suburban C2500, 7.4 N
Control Units
1993 Chevrolet Suburban C2500, 7.4 NSECTION Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| ABS Diode Module | Under left side of dash. | |
| ABS Module | Mounted on side of brake master cylinder. | |
| Audio Alarm Module | On convenience center. | |
| Coolant Level Sensor Module | Behind center of dash. | |
| Cruise Control Module | On left side of firewall, near brake booster. | |
| Daytime Running Lights (DRL) Module | Behind left side of dash, taped to panel wiring harness. | |
| Diesel Elec. Control (DEC) Module (6.2L Diesel) | Behind right side of dash. See Figure. | |
| Glow Plug Controller (Diesel) | On left rear of intake manifold. | |
| Hot Fuel Handling Module | ||
| 5.7L HD | Behind right side of dash, above blower motor. See Figure. | |
| 7.4L A/T & M/T | Behind left side of dash, behind brake booster. See Figure. | |
| Ignition Control Module | On center rear of engine, near ignition distributor. | |
| Knock Sensor Module (M/T) | ||
| 5.0L & 5.7L A/T & M/T | On top right of engine. See Figure. | |
| 7.4L A/T & M/T | On top right of engine. See Figure. | |
| Powertrain Control Module (PCM) | ||
| 4.3L California | Behind right side of dash, above blower motor. See Figure. | |
| 4.3L Federal | Behind right side of dash, above blower motor. See Figure. | |
| 5.0L & 5.7L A/T & M/T | Behind right side of dash, above blower motor. See Figure. | |
| 7.4L A/T & M/T | Behind right side of dash, above blower motor. See Figure. | |
| Radio Receiver Module | Behind center of dash. | |
| Transmission Control Module (TCM) | Behind right side of dash. | |
| Wiper Motor Module | ||
| Front | On firewall, behind wiper motor. | |
| Rear | On lower inner center of rear window. | |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.